論文

査読有り 国際誌
2020年4月29日

Ultra high-resolution computed tomography with 1024-matrix: Comparison with 512-matrix for the evaluation of pulmonary nodules.

European journal of radiology
  • Mitsuko Tsubamoto
  • ,
  • Akinori Hata
  • ,
  • Masahiro Yanagawa
  • ,
  • Osamu Honda
  • ,
  • Tomo Miyata
  • ,
  • Yuriko Yoshida
  • ,
  • Akiko Nakayama
  • ,
  • Noriko Kikuchi
  • ,
  • Ayumi Uranishi
  • ,
  • Shinsuke Tsukagoshi
  • ,
  • Yoshiyuki Watanabe
  • ,
  • Noriyuki Tomiyama

128
開始ページ
109033
終了ページ
109033
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.ejrad.2020.109033

PURPOSE: To determine whether a 1024-matrix provides superior image quality for the evaluation of pulmonary nodules. MATERIALS AND METHODS: Prospective evaluation conducted between December 2017 and April 2018, during which CT images showing lung nodules of more than 6 mm and less than 30 mmm were reconstructed with 2 different protocols: 0.5-mm thickness, 512 × 512 matrix, 34.5-cm field of view (FOV) (0.5-512 protocol); and 2-mm thickness, 1024 × 1024 matrix, 34.5-cm FOV (2-1024 protocol). Lung nodule characteristics such as margin, lobulation, pleural indentation, spiculation as well as peripheral vessels and bronchioles visibility and overall image quality were evaluated by three chest radiologists, using a 5-point scale. Image noise was evaluated by measuring the standard deviation in the region of interest for each image. RESULTS: A total of 89 nodules were evaluated. The 2-1024 protocol performed significantly better for the subjective evaluation of pulmonary nodules (p = 0.006 ∼ p < 0.0001). However, image noise was significantly higher both subjectively and objectively (p = 0.036, p < 0.0001). CONCLUSION: The use of a 2-1024 protocol does not increase the amount of images and allows better assessment of pulmonary nodules, despite noise increase.

リンク情報
DOI
https://doi.org/10.1016/j.ejrad.2020.109033
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/32416552

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